A very good performance, congratulations!
I especially like your fugue interpretation. The beginning of the toccata is (for me) unusual slow, but it works well with the heavy reverb in the church. Due to that reverb, the faster parts of the toccata like the difficultier 2-hand last run of the toccata, the notes cannot be differentiated anymore, it is more or less a sound pulp (I don't blame you for that, since you cannot change the acoustic (maybe you could articulate more staccato here and there however)). In the beginning presto part of the toccata it sounds like small uneveness to me, but overall your playing is very profound, and I am glad we have it here at PianoSociety.
I have to say again though, this piece is terribly overrated. Very effective, especially in documentaries and horror movies Wink , and probably great fun to play, but musically it pales into insignificance next to what I call Bach's "real" organ works (the chorale-based works, the Clavier-Ubung, and the Trio Sonates). In fact several Bach scholars doubt, with good arguments, that this piece is by Bach at all.
After all, the main purpose of music is to enjoy the (mostly untrained) listeners, and this impressive piece does the job perfectly. I agree that it is not the most intellectual piece what reveals to someone only after listening the 100th time. Do you enjoy a 4-voice fugue the same amount already after the 1st listening or playing, Chris? Me not, it develops with time and repetitions for me. So it's good to have pieces like that a listener is able to enjoy right during the first listening.
But I believe that the Fugue is one of his best. Come to think about it, this piece is like Chopin and the Fantasy Impromptu. On the surface thats what he is only known for, especially to the untrained nonclassical listener.
I like your comparision with Chopin - FI!
But no, the fugue is maybe one of the most impressive ones, but one of the best? I am asking whether it is really a fugue at all. Master Bach is regarding fugues normally very serious concerning taking the theme for every voice and working the voices through the fugue. It is no typical fugue regarding the voices, and that is what makes me doubt the most that it comes from Mister Bach himself. But impressive, indeed...